传感光纤光栅高温环境下反射率特性研究

Research on reflectivity characteristics of sensing fiber Bragg grating under high temperature environment

基于光纤光敏性原理,设计了分子结构模型,介绍了以光纤布喇格光栅(FBG)的反射率作为主要指标时高温时间对FBG使用寿命的影响,描述了反射率、温度与时间之间的关系,并得到理论公式。通过进行330℃、400℃与500℃的恒高温实验并对结果仿真分析,得到该高温FBG在330℃环境下具有较长传感寿命的结论。

The paper designs the molecular structure model based on the principle of optical fiber photosensitive, introduces the effect of high temperature time on the service life of fiber Bragg grating （FBG） with the FBG reflectivity as the major indicator, and describes the relationship between the reflectivity, the temperature and the time with the theoretical formula. The results are simulated and analyzed by constant temperature test at 330℃, 400℃ and 500℃, and obtains the conclusion that the high temperature FBG has a long sensing life in the 330℃ environment.